The simple ring of a bright blue-collar. The material uses the allergic new material 316L stainless steel which is hard to appear called the non-allergic material.It is hard to discolor for blue coating and adopts the PVD coating method that vivid expression is possible. Because it is a ring of the on the small side, the stack pickles are OK! Stack pickles with the silver-colored ring are affinity GOOD! Because I am said to be a ring of the happiness, the ring of the blue is recommended to a pair.